RpmExtreme LS JK GEN3 DIY Conversion Harness 07-11 JK

  LS JK GEN3 DIY Conversion Harness 07-11 JK

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  • jeep jk wrangler 3.8 LS engine swap harness GEN3
  • jeep jk wrangler 3.8 LS engine swap harness GEN3
  • jeep jk wrangler 3.8 LS engine swap harness GEN3
  • jeep jk ls swap fuel line
  • Jeep JK LS Swap EZCANBUS Rpmextreme
  • GEN 3 fuel injector connector types rpmextreme ls swap jeep jk
Part Number: GEN3-JK-07-11-HARNESS - GEN3-JK-07-11-HARNESS

Available Options

Retail: $3,695.00 Web Price: $3,295.00

Product Description

12-14  Week lead time from when ordered. 


07-11 JK SWAP GM LS V8 Drive By Wire Engine Harness


This engine harness is for 2007-2011 Jeep wrangler JK when installing a GM LS GEN3 series truck engine 2003-2007 with Drive By Wire aka DBW Electronic Throttle Pedal. This is the bare bones that you need to install a LS GEN3 and have everything working as designed. We know it may seem like a lot of money up front but the time it will save you is well worth it. 


With the overwhelming amount of GM LS series V8 engines at great prices it makes this swap a home run.  


We know it can seem daunting to try and wrap your head around so many options, We try and make it a no brainer to get your Jeep up and running. Our harness comes complete with new relay-fuse pack and OBD2 connector under the dash and with only a few wires to splice into the existing Jeep its extremely easy to be up and running.


Completely redesigned.

The OEM engine harness provides us almost limitless room for design improvement. OEM wiring includes many features that enthusiasts will not utilize and thus they add unnecessary clutter and weight, as well as reduce the ability to esthetically accentuate the engine bay. Our harnesses are designed to be better than OEM quality with newer improved quality wires, connectors, and loom designed to last. They are more flexible and simpler by design than the OEM harness, and they are mapped out in the engine bay to offer the most appealing and maintainable installation we have found possible.

Our engine harness offers many revisions over the OEM harness. Our harnesses integrate the Jeep side and GM side harnesses into a single harness. The engine harness routes directly to the ECU with a factory style plug at the factory firewall connector. The bulk of the harness routes behind the engine and under the fuel rails which is most visually appealing and allows for factory engine covers to be used. We also now include a EZtach module that eliminates the need for a reluctor ring and make the swap that much easier.

The final result is a harness that features improved esthetics and versatility, easier install and maintenance, and premium quality and durability.


This harness is designed to be used with the factory GM accessories. AC and Alternator

This harness comes complete with a EZcanbus module and EZTACH module.

This harness come with a plug and play fuel line. (returnless style fuel rail)

Fully functional dash display with PRNDL  (you will need a GM TRS trans range switch (single connector style)

Fully functional cruise control with the factory Jeep switches

Fully functional AC and heat from factory controls

Pentastar Fan compatible 



This system is designed for use with the 2003-2007 TAC Module and pedal.

Earlier engines can be converted with newer throttle body and electronics. (Contact us for details)


Engine computers should match with the correct Throttle body - TAC module - Pedal and Transmission.

The 2003+ Throttle bodies will have a 8 pin plug.

The PCM will have a Green and Blue connector.


2003:  PCM Serv. No's: 12576106, 12581565, 12582605,  89017733

2004:  PCM Serv. No's: 12586242, 12586243

05-07: PCM Serv. No's 12589462, 12589463, 12602801, 12602802 

2003-2005 TAC # 12573058. With Accelerator Pedal #15264643 ( METAL )

2006-2007 TAC # 12590008. With Accelerator Pedal #15107594 * ( PLASTIC )

Throttle Body - 03-07 GM (12679525)

* 06-07 plastic accelerator pedal requires a different APP harness and matching TAC module. Our APP bracket will work with this pedal without any modifications. Be sure to let us know which pedal you are using so we can be sure to get you the correcxt APP harness.*

In 2004,Most truck engines went to a single 3/8" supply line, with NO RETURN LINE (returnless).   You will want a returnless system. If your engine is not returnless, either locate a returnless fuel rail or modify and block your regulator / return line fitting to make it a returnless system. You will use your Stock Jeep fuel pump without any modifications. 


Crank Shaft Reluctor Ring Types:

It is important to know which crankshaft reluctor ring type you have, 24x (GEN3) or 58x (GEN4). You can usually tell by looking at the crank sensor. a black crank sensor is a 24x and a gray crank sensor is for a 58x engine. The GEN3 will need to be a 24x crank reluctor ring with a black crank sensor. We have seen some newer replacement crank sensors that do not follow this color description anymore. 

The following engines came with a 24-tooth reluctor ring: We only support the electronics from the 03-07 GEN3 GM Truck engines with this GEN3 conversion. 

  • 1997–2004 Corvette, LS1 or LS6 (all were early drive-by-wire ) NOT SUPPORTED
  • 2005 LS2 Corvette (DBW, Cound be 24x or 58x Crank sensor) NOT SUPPORTED
  • 1998–2002 Camaro/Firebird. NOT SUPPORTED
  • 2005–2006 LS2 GTO, 2004–2006 SSR (LS2 and 5.3 liter) NOT SUPPORTED
  • 1999–2002 4.8, 5.3, 6.0 Vortec truck engines. NEEDS CONVERTED TO 03-07 SPECS
  • 2003-2007 *** 4.8, 5.3, 6.0 Vortec Truck Engines. SUPPORTED
  • *** In 2007 GM made both GEN3 and GEN4 Engines. Be sure to verify what you have ***

Install Instructions can be found HERE

If you have questions please email us HERE



You will need to use this chart to verify the type of fuel injector you will be using. 

Fuel Injector Connector Type



You will need to run the newer single connector Transmission range switch GM # 24221125